Cutting apparatus for harvesters.



No. 880,553. v PATENTED MAR. 3, 1908.

J. LUTIN. CUTTING APPARATUS FOR HARVBSTERS.

APPLICATION PILEDFEB. 3, 1906.

W ITNESSES:

JOHN LUTIN, OF STERLING, COLORADO.

CUTTING APPARATUS FOR HARVESTERS.

Specification of Letters Patent.

Patented March 3, 1908.

Application filed February 3. 1906. Serial No. 299.354-

To all whom it may concern:

Be it known that I, JOHN LUTIN, a citizen of the United States, residing at Sterling, in the county of Logan and State of Colorado, have invented a new and useful Cutting Apparatus for Harvesters, of which the'following is a specification.

This invention relates tus for harvesters.

In. cutting apparatus, as now ordinarily constructed, it has been found that the knives or blades which constitute the sections of the sickle, and which are riveted or otherwise mounted upon the reciprocatory sickle bar, after a period of wear are apt to interfere with the ledger plates that is to say, the corto cutting apparaners of the latter will rise in the path of the edges of the knives or blades, causing the latter to catch upon said corners, causing the knife edges to become blunted and chipped, and quickly rendered unserviceable.

To overcome these objections is the principal object of the present invention; other objects being to simplify and improve the construction of the knife blade, and to shorten the edge that requires grinding and sharpenmg.

INith these and other ends in view, which will readily appear as the nature of the invention is better understood, the same consists in the improved construction and novel arrangement and combination of parts, which will be hereinafter fully described and particularly pointed out in the claims.

In the accompanying drawing has been illustrated a simple and preferred form of the invention, it being, however, understood that no limitation is necessarily made to the precise structural details therein exhibited, but that changes, alterations and modifications within the scope of the invention may be made, when desired.

In the drawings, Figure 1 is a top plan view of a portion of a cutting apparatus embodying the invention. Fig. 2 is a vertical sectional view taken on the plane indicated by the line 22 in Fig. .1. Fi tive view of one of the blades, detached.

Corresponding parts in the several figures are indicated throughout by similar characters of reference.

The cutting knife or blade which constitutes the present invention may be described as consisting of a rectangular brace 1 having g. 3 1s a perspec-- a forwardly extending approximately triangular blade or cutting member 2 the two sides of which are beveled, as at 3, to form the cutting edges 4. The side edges of the blade 2 merge with the base at a distance from the ends of the latter, thus forming, between the cutting edges and the ends of the base, shoulders 5, 5, as clearly seen in Figs. 1 and 3 of the drawings. The base 1 is provided with apertures 6 for the passage of fastening members 7 whereby a plurality of the cutting sections are secured upon the sickle bar 8, which is guided for reciprocation upon the finger bar.9 having the guard fingers 10 upon which the ledger plates 11 are mounted in the usual manner.

It will be noticed, by reference to Fig. 1, that the bases 1 of the cutting members are extended forwardly from the sickle bar, so as to overlap the ledger plates. The shouldered ends of the bases 1 1 abut upon each other, thereby spacing the blades 2, 2 suitably apart, and to provide enlarged clearances at the crotches of the cutting members, whereby to prevent choking, or the retention of straw or the like at these points.

By the construction set forth, the cutting members will present a practically unbroken surface for contact with the ledger plates, and joints are avoided which could by any possibility be made to interfere with the smooth and successful operation of the device. The surface requiring grinding and resharpening is shortened, and the efficiency of the device is unimpaired.

Having thus described the invention, what is claimed is In a cutting apparatus for harvesters, a cutter bar having guard fingers provided with ledger plates, in combination with a reciprocatory sickle bar, and cutting members mounted upon the latter andhaving rectangular bases that overlap the ledger plates and project beyond the cutting edges of the members, whereby to provide enlar ed clearances at the crotches thereof.

n testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two witnesses.

JOHN LUTIN.

Witnesses:

L. BENGE, J. M. DAVIS. 

